Slack-puller for cableways



K. BERGER.

'- SLACK PULLER FOR CABLEWAYS.

APPLICATION FILED DEC. 20, 1920. I

1,393,604. A Patented Oct. 11, 1921.

UNITED STATES KNUTE BERGER, or SEATTLE,

PATENT OFFICE.

.A CORPORATION WASHINGTON.

SLACK-FULLER FOR CABLEWAYS.

Specification of Letters Patent.

Patented Oct. 11', 1921.

Application filed December 20, 1920. Serial No. 431,992.

To all whom it may concern:

Be it known that I, KNUTE BERGER, a citizen of the United States ofAmerica, and resident of the city of Seattle, in the county of King andState of Washington,

have invented certain new and useful Improvements in Slack-Pullers forCableways, of which the following is a specification.

My invention relates to slack pulling devices for use on cableways.

The object of my invention is to provide a device for pulling out theslack of a hoist or fall rope so as to insure the ready lowering of sucha rope from the carriage or sheave over which it passes.

The particular parts and combinations of parts of which my inventionconsists and upon which I desire to secure a patent will be hereinafterdescribed and then particularly pointed out in the claims.

Figure 1 shows diagrammatically a cableway upon which my invention hasbeen placed.

Fig. 2 is a detail showing the swivel connection at each end of theblock which is employed in carrying out my invention.

In the drawings 1 represents an overhead trackway, as, for instance, acable which is stretched between a head tree 10 and a tail tree 11. Thistrackway may, of course, be of any other suitable construction. Mountedupon this trackway so as to travel therealong is a carriage 2. Thiscarriage may in many respects be of any suitable and desiredconstruction.

Carried by this carriage, either directly in the frame thereof or, asherein shown, in a separate frame 30 which is pivotally supported fromthe carriage,is a sheave 3 over which passes the outer end of a hoist orfall rope 4. This fall rope extends either directly or indirectlythrough a connecting rope, as 40, to a head tree and to an engine orother means for operating the same.

I have shown a sheave, as 41, mounted upon a head tree, over which thisrope passes. As herein shown and as I prefer to mount the same in myinvention, the two parts of this rope, as 4 and 40, are connectedthrough a'block as 5, by means of swivel connections which are shown indetail in Fig. 2 and which include eyes 50 which are rotatably mountedin each end of the frame of the block. A haul back line 6 is secured tothe carriage and passes through a distant sheave, as 60, carried by thethrough other sheave or sheaves 61, which preferably are mounted at somepoint laterally removed from the oableway so that the return run of thisrope cannot become entangled with the carriage or the other ropesthereof.

A slack pulling rope, as 7, has one end thereof secured to the frame 30of the sheave 3, or in some other way to the carriage. This rope passesthrough the block 5 and thence back to the tail tree 11. Preferably thiswill pass through the carriage or over the sheave as 7 0 carried by thecarriage and from the tail tree pass back to the operating drum, throughsheaves, as 71, which are supported at points laterally removed from theline of the cableway.

By theabove method of connecting the slack pulling rope to the haul orhoist rope, the slack pulling rope may be made quite small, as it has adouble purchase by use of the block 5. In consequence the slack due to avery long span, or to the use of a tall tree and thence heavy rope, maybe more easily taken up. 1

In addition the hoist or haul rope 40 may be drawn more tightly andconsequently the fall, or the outer portion 4 of the hoist rope, may beextended farther than would otherwise occur.

What I claim as my invention is:

1. The combination with a sheave carried by a cableway carriage, a hoistrope passing over said sheave, a block carried by the hoist rope betweenthe carriage and the head end of the cableway, and a: slack pulling ropeextending from the carriage through said block and back with its endsecured at the carriage.

2. The combination wlth a sheave carrled by a cableway carnage, a hoistrope passing over said sheave, a block having swivel connections by eachend with the hoist rope to form a link therein and located between thecarriage and the head end of the cableway, and a slack pulling lineextending from the carriage through said block and back and having anend secured at the carriage. v

V 3. In a cableway, in combination, a track- Way cable, a carriagethereon, a hoist line,

a sheave carried by the carriage and over "which the hoist line passes,a block having swiveling eyes at each end, the hoist rope being dividedinto two sections which are connected, each to its respective swiveled10 eye of the block, and a slack pulling line passing from the carriagethrough said block and back to a securer'nent to'the carriage.

Signed at Seattle, King county, l/Vash- 15 i'ngton this 15 dayo'fDecember 1 920. V

KNUTE BERGER.

